Shears-grinder



E. M. STRATTON.

SHEARS GRINDER.

APPLICATION FILED 950.15. 1919.

Patented Mar 15, 1921 UNITED STATES PATENT OFFICE.

EZRA MILLARD STRAT'ION, 0F VIRGINIA, MINNESOTA.

SHEARS-GRINDER.

Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed December 15, 1919. Serial No. 344,815.

and State of Minnesota, have invented a new and useful Shears-Grinder,of which the following is a specification.

This invention relates to devices for holding a cutting implement whilebeing ground and likewise for adjustably holding the grinding orabrading element in coactive position relative to the implement holdingportion, and has for one of its objects to simplify and improve theconstruction and increase the efliciency of devices of this character.

With these and other objects in view, the invention consists in certainnovel features of construction as hereinafter shown and described andthen specifically pointed out in the claim, and in the drawingsillustrative of the preferred embodiment of the invention,

Figure 1 is a side elevation,

Fig. 2 is a plan View of the improved device.

Figs. 3 and 4 are end views of the opposite ends of the device.

The improved device includes a base or support 10 of any suitablematerial, preferably hard wood.

Attached to the base intermediate the ends, is a plate 11 upturned atthe ends as shown at 12 and 13, the portion 12 forming an abutmentagainst which one end of the grinding element 14 is held, as shown. Theupturned portion 13 is extended horizontally as shown at 15 and providedwith a threaded boss 16.

At the end of the base 10 farthest from the plate 11 and its upturnedportion 12, is a stop member 17 through which a clamp screw 18 operates,to engage the grinding element 14 and retain it in position upon thebase 10.

By this means the grinding element is firmly held in position on thebase and in parallel relation thereto and to the horizontal portion 15of the supporting plate.

A guide rod comprising a horizontal portion 17 and vertical portion 18forms a part of the device, the vertical portion being threaded toengage through the threaded boss 16, as shown, and locked in position bya wing nut 19.

By this means the horizontal portion of the guide rod may be adjustedvertically by releasing the wing nut and rotating the rod until therequisite elevation is reached, and then the adjusted position retainedby actuating the wing nut which thus serves as a jam or look nut.

A supporting arm formed of two mem-' bers 20 and 21 hingedly united at22 is disposed above the base 10 and downturned at one end terminatingin an eye 23 slidably engaging the horizontal part 17 of the guide rod.

The portion 20 is enlarged laterally as shown to form a nether supportfor the implement to be ground, for instance one leg 24 of a pair ofshears, the implement being held in place by a clamp plate 25 and clampscrew 26.

By this simple arrangement the shears member, or other implement to beground may be firmly retained in its adjusted position, and at anyrequired angle drawn back and forth over the grinding element andretained at the same angleduring the grinding operation.

The ground edge will thus be true and accurate, and can be groundwithout danger of turning the edge, as the article is firmly held in thesame position relative to the abrading element at all parts of thestroke, and in both directions of the stroke.

The jointing of the arm 20-21, enables the implementbeing ground to belifted free from the grinding element for inspection, or for removingfrom or attaching to the holding portion of the device.

The preferred embodiment of the invention is disclosed in the drawingsand set forth in the specification, but it will be uned horizontally, agrinding element supported on the base and bearing at one end againstthe stop, a bracket carried by the base and having a clamp screwoperating against the grinding element, a' guide rod comprising avertical portion and a horizontal portion,

means for adjustably supportingthe vertical portion of the guide rodrelative to the. horizontal extension of the plate, an arm with one partslidably engaging the hori- 10 zontal portion of the guide rod, andmeans for supporting an article to be ground re1ative to said arm. a v

EZRA MILLARD STRATTON.

